/*
 * @(#)cn.design.pattern.interpreter 2020/4/27/0027
 *
 * Copy Right@ 人人译视界
 */


package cn.design.pattern.interpreter;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;

/**
 * <pre>
 * @author tuwei
 *
 * @version 0.9
 *
 * 修改版本: 0.9
 * 修改日期: 2020/4/27/0027
 * 修改人 :  tuwei
 * 修改说明: 初步完成
 * 复审人 ：
 * </pre>
 */
public class Client {
	public static void main(String[] args) throws IOException {
		String expStr = getExpStr();
		HashMap<String, Integer> var = getValue(expStr);
		Calculator calculator = new Calculator(expStr);
		System.out.println("运算结果：" + expStr + "=" + calculator.run(var));
	}

	public static String getExpStr() throws IOException {
		System.out.println("请输入表达式：");
		return (new BufferedReader(new InputStreamReader(System.in))).readLine();
	}

	public static HashMap<String, Integer> getValue(String expStr) throws IOException {
		HashMap<String, Integer> map = new HashMap<>();
		for (char ch : expStr.toCharArray()) {
			if (ch != '+' && ch != '-') {
				if (!map.containsKey(String.valueOf(ch))) {
					System.out.print("请输入" + String.valueOf(ch) + "的值：");
					String in = (new BufferedReader(new InputStreamReader(System.in))).readLine();
					map.put(String.valueOf(ch), Integer.valueOf(in));
				}
			}
		}
		return map;
	}
}